Nalgene On-The-Fly Bottle

The large, pop-up spout on Nalgene's On-The-Fly bottle made drinking a breeze, but testers found it was a chore to close. Plus, it tended to leak. Still, the bottle is easy to fill with water and equally simple to clean (it's safe for the dishwasher). The manufacturer promotes this bottle as BPA-free. nalgene.com.